Extensicn ladder



J. H. RIDINGS. EXTENSION LADDER.

FILED JULY 2|.1920.

ldatentetll El i, flhlfitti.

J'QHN HJENEY RIDINGS, 0F GOAL CITY, ILLINOIS;

EXTENSION LADDEB.

.Apphcationfiled July 21, 1920. Serial Nb. 393,017.

To all whom it may amaze m Be it known that l. iloirn' l mos a citizenof the United than residing); at

Coal City. in the county or"? Grundy and 5 Fitate oi .illinois haveinvei'itcd certain neu and. useful lln'i.provements in Extension Ladders. of which the following is a specifics tion.

My invention relates to improvements in 10 extension ladders. and moreparticularly to the consatruction. mounting: and general orrangement otthe round engaging members or hooks pii'otally carried by the extensionladder. section. and adapted to swing in plane at right angles to thelongiritudinal plane of therounds oi the stationary ladder section.

The primary obiect ot' the invention is to provide a generally improvedmounting: tor the roundengaging member or hook for use in connectionwith extension ladders, which will be exceedingly simple inconstruction, cheap oi manufacture, and eliicient in use.

With the above mentioned and other ends in View, the invention consistsin the novel constructiom arrangement. and combination of parts.hereinafter described. illustrated in one of its embodiments in theaccompany- 0 i119; drawings. and particularly pointed out I in theappended claim.

Referring to the drai-vings forming: a part of this specification.Figure 1 is a perspcc tive view of the improved extension ladder withthe round en agingr member in detached 'iosition prep ratorytocxtending' or elevating the extension ladder section.

Fig. 2, a side elevation of one of the round. engaging members or hooksdetached. i

Fig. 3, an enlarged rear elevation ot the same, the "bearings andattaching); bracket elements being shown in section and disassembled.

Fig. 4C, a fragmentary longitudinal sectional view of the adjacentladder section and illustrating the open or detached positions of theround engaging members in movingor adjusting; the movable or extensionladder section relatively to the lower or stationary ladder section.

Fig. 5, a similar View, illustrating the relative position of the partsin lowering the extension ladder section and particu larly shov'vin thehooks closed. by the rune] in tan-china over an adjacent round of thestationary ladder section.

Fig. 6, a similar View, illustrating the round engaging position of thehooks.

Similar numerals of reference designate like parts thruout all thefigures ot the draw ings. o

The improved ladder comprises a relatively fixedor stationary laddersection 1. and a relatively movable or extension ladder section 2. i

The ladder sections 1 and 2 comprise the usual side members providedwith the usual rounds 1 and 2*. respectively.

The side members of the extension section 2, are mounted Within the sidebars ot the stationary section in the usual manner; and are guided attheir upper ends by means of guide members or clips 3.

The extension section 2 may be extended and retracted in any suitableand convenient manner, as for example.-by means or a cable t connectedto one of the rounds ot the extension section and extending upwardly andover apulley 5 of the stationary section and returning downwardly Withineasy reach of an operator from the base of thestationary section.

Referring now to the improved round" e11- gaging members or hooks andthe improved method of mounting the same to which this inventionparticularly relates. it u-illbe seen that the round engaging hooks ormembers are arranged in pairs on the inner sides of the side bars of themovable or extension section. and in view of the tact that. such hooksor members are duplicates of each other and operate simultaneously adetailed description ct one Will describe the other.

The round engaging member comprises a main body portion 6, terminatingat one end in a bearing head 6 having an openingto receive and take overthe bearing" head 7 of a bracket member 7, detachably secured to theinner side ofthe adjacent side bar of the ladder by means of attachingscrews 7*. As a means of removably securing the bearing head 6*, 0f thepivoted round engaging; member, a bolt 7 is removably mounted in thebearing head 7 of the bracket 7, and is connected at its inner end bymeans of a nut 7 a Washer 7 being inounted beneath the not 7 to retainthe hook engaging member in position.

The was; engatg ing members d swing llltl freely on the bearing heads 7of the bracket 7, and depend therefrom.

Each round engaging member is provided at its lower end with spacedprojections forming round engaging stop and hook members 6 and 6 spacedapart forming a guideway adapted to receive and contain one of therounds l of the stationary ladder section 1, the rear inclined arm ofthe round engaging member being inclined to successively pass over andbe reciprocated by the rounds of the stationary ladder section whenelevated as indicated in Fig. l of the drawings.

As a means of initially closing the hook member 6 when it is desired toelevate and detach the latter from the rounds of. the lower section 1when in engaged position as shown in Fig. 6, and when the hook is raisedupwardly by the elevation of the extension section 2 to a positionsubstantially as shown in Fig. 4: and whereby upon the return of theextension section as illustrated substantially in Fig. 5, the hook 6will successively be closed as the upper or extension section 2 is moveddownwardly, the curved stop member 6 is provided with a hook closurerunner member 8 pivotally connected by means of a pivot pin 8extendingthru side bearing lugs 8 of the runner member, said runnermember being curved as shown and having its tip 8 adapted to engage andclose the hook member 6, so that when the extension section is loweredfrom the position shown inFig. l toward the position shown in Fig. 5 thetip of the run ner member 8 will engage with the adjacent lower round ofthe stationary ladder section and swing the round engaging memberoutwardly to pass over the round, as illustrated in Fig. 5.

lVhen the extension ladder section 2 moved upwardly from engagementwith. one round of the stationary ladder section to another orsuccessively higher round, the round engaging members will be rocked onpivots and successively pass over the rounds as will be obvious uponreference to Fig. l.

Should it be desired to engage one or the rounds of the lower orstationary section to secure the upper or extension section in position,said extension section 2 may be given an initial elevating movementsutlicient to allow the rear side of the round.

engaging inen'iber to ride over the adjacent. round and the tip ol thehook member to clear the round oi the stationary memer or laddersection, whereupon a slighi retracting movement or? the extension laddersection will cause the hook ('r to engage with the rounds as shown inFig. l of the drawings.

It will be seen that the stop and hook members (5" and 6 limit androutine the movements oli the round ci'igaging members. and that thehook closure runner member.- 8 act to automatically close the books (3and. prevent their eng ging with the sili-ccssivr rounds oi? thestationary sections as the upper section 2 is returned over the lowerSec-- tion, such members forming runner members so that the same willride over the successive rounds transmitting a Hull] i' ::1l1o;'movement to the round engaging members as a whole until the desiredadjusted position oi? the extension section is reached. whereupon thesame may he moved to ramthe hook members (3 to engage with the rounds oithe stationary ladder section in the manner hcreinbeiore described.

Having thus described one of the embodiments of my invention, withouthaving attempted to set forth all the forms in which it may be made orall the modes of its use. what I claim and desire to secure by LettersPatent, is,

in a mounting for extension ladder round engaging hooks, an attachingbracket adapted to be secured to the inner side. of one of the rails ofthe adjacent extension ladder section and provided with a bearing headhaving a bolt receiving opening extending axially thereiihrough saidopening being onlargedon the rail-engaging side ol said attachingbracket, :1. bolt extending through said opening and having a headsealed in said enlarged portion of the opening and covered by saidattardiing bracket when the latter is mounted. a round engaging memberhaving a bearing head. pivoted on said hearing head of said bracket, anda Fastening element detachabl secured to the inner end of said bolt andbearing against saidbear ing head oli said round engaging member. Intestimony whereof I have uilixed my signature.

JOHN H lQNlt if RIDING S.

Iii)

